More than 200 hospital nurses represented by the Massachusetts Nurses Association will vote on whether to authorize a strike.

The union said the results will be disclosed some time after balloting ends at 9 p.m. If the measure is approved, the union negotiating committee would be empowered to call a strike if the negotiations reach a dead end.

Once the committee issued a notice to strike, a strike would begin in 10 days.

The hospital is part of Baystate Health, a health care system that includes Bay State Medical Center in Springfield and three other facilities in Western Massachusetts.